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This is a must-have for AR15 owners. These are the most frequently lost parts on an AR15, and without them, you're out of business. What's better is it comes in a tube that's the same size as (2) 123A batteries so that you can store it inside many buttstocks on the market today. Here's what's in the kit:

Don't be caught without these spare AR15 parts!

Pivot pin

Takedown Pin

Takedown/Pivot Pin Detent Spring

Ejector/Selector Detent Spring

Hammer/Trigger Pin

(3) Bolt gas Rings

(2) Extractor Springs

Selector/Safety Detent

Extractor Pin

Takedown/Pivot Pin Detent

Extractor

And we thought the only thing Choate left out was a firing pin retaining pin. So we've added one of those too!